Dear brother Durrani,
Your post will shine with just two references from the Qur'an. Such is the Power of the Magnificent Book.
10:19 All mankind were but one community (and are meant to be so); then they differed. Had it not been for a Word that went forth from your Sustainer (the Law of Free will), He would have judged their disputes immediately. [2:30, 2:213, 2:256, 11:118, 16:9, 76:2-3]
Yes, the world has no choice but revert to the System of Life ordained in the Glorious Book.
9:32 They seek to extinguish God’s light (the Qur’an) by their utterances. But God will not allow this to pass, for He has willed to spread His light in all its fullness even though the rejecters may detest it.
9:33 He is the One Who has sent His Messenger with guidance and the True Religion (The Divinely Prescribed System of Life), that He may cause it to prevail over all religions and systems of life, even though the idolaters may detest it.
[5:3, 9:31-33, 13:31, 14:48, 18:48, 41:53, 48:28, 51:20-21, 61:8-9. The Qur’anic Deen will prevail over all religions. This refers to Christianity, Judaism, Hinduism, Buddhism, Confucianism, Taoism, Zoroastrianism and all other forms of ‘Isms’ and religion, including the sects that are now present in the name of Islam. Please remember that no sect can be considered Islamic. DEEN in the Sight of God is nothing but Al-Islam (5:3). But next to religions, the Qur’anic System of Life will also dominate and prevail over all manmade political and social systems such as Communism, Atheism, Secularism, Secular Democracy, Despotism, Theocracy, Monarchy, all “isms” such as “Humanism” Socialism, Idol worship in any form, Sufism and Capitalism. This will happen as humanity, after the centuries old, protracted toil of trial and error will come to intellectually realize, and accept the Supremacy of the Final Testament, Al-Qur’an]